Almeida, J, Sauce, D, Price, D, Papagno, L, Shin, S, Moris, A, ...
No abstract available.
ON THE CONTROL OF AUTONOMOUS MOBILE ROBOTS (2008)
J. Sousa, F. Pereira, A. Martins, A. Matos, J. Almeida, N. Cruz, ...
In this article, we describe the effort being carried out in the analysis, design and implementation of the Vehicle and Mission Management Systems of a mobile platform for autonomous transportation,...
VBS State Induced by Impurity Frustration in Cr8Ni (2008)
Almeida, J., Martin-Delgado, M. A., Sierra, G.
We provide a physically meaningful picture of the nature of the ground state of the Cr8Ni compound in the regime where it is a spin singlet. According to this picture, the anisotropy of the $Ni$ atom...
PORTUGALIAE MATHEMATICA Vol. 58 Fasc. 4 – 2001 (2008)
Nova Série, Sur Certains, Systèmes D’équations Avec, J. Almeida, M. Delgado, J. Almeida, ...
Dans l’article [1], les relations entre un théorème de Herwig et Lascar [7] sur certaines équations dans un groupe libre et la preuve donnée par Ash [3] de la “conjecture du type II ” ont...
DECIDABILITY AND TAMENESS IN THE THEORY OF FINITE SEMIGROUPS (2008)
Abstract. This is a survey of results of the profinite approach to decidability problems in the theory of finite semigroups.
Abstract. Given a basis of pseudoidentities for a pseudovariety of ordered semigroups containing the 5-element aperiodic Brandt semigroup B2, under the natural order, it is shown that the same basis,...
A Hybrid Feedback Control System for a Nonholonomic Car-like Vehicle (2008)
J. Almeida, F. Lobo Pereira, J. Borges Sousa
This paper addresses the design of a hybrid feedback control system enabling a car-like, rectangular vehicle to perform a tight L-shaped turn maneuver. This case constitutes an effort towards the...
Power Semigroups: Results And Problems (2007)
This is a survey of work on the algebraic theory of the power operator on pseudovarieties of semigroups and monoids. Besides exploring connections with other operators, various problems and partial...
On the equation V * G = ΕV (2007)
This note uses some recent powerful tools related with semidirect products V W of pseudovarieties of semigroups, particularly when the second factor is the pseudovariety G of all finite groups, to...
The Gap Between Partial and Full: An Addendum (2007)
Almeida Higgins Volkov, J. Almeida, P. M. Higgins, M. V. Volkov
project Praxis/2/2.1/MAT/63/94. Support from F.C.T. through Centro de Matem'atica, University of Porto, Porto, Portugal, is also gratefully acknowledged. y The paper was started when the third...
On The Control Of Autonomous Mobile Robots (2007)
Sousa Msc, J. Sousa, F. Pereira, A. Martins, A. Matos, J. Almeida, ...
In this article, we describe the effort being carried out in the analysis, design and implementation of the Vehicle and Mission Management Systems of a mobile platform for autonomous transportation,...
On The Design Of A Hybrid Feedback Control System For A Nonholonomic Car-Like Vehicle (2007)
Almeida Lobo, J. Almeida, F. Lobo Pereira, J. Borges Sousa
This paper addresses the design of a hybrid feedback control system enabling a car-like, rectangular vehicle to perform a tight L-shaped turn maneuver. This case constitutes an effort towards the...
On The Control Of Autonomous Mobile Robots (2007)
J. Sousa, F. Pereira, A. Matos, A. Matos, J. Almeida, N. Cruz, ...
In this article, we describe the effort being carried out in the analysis, design and implementation of the Vehicle and Mission Management Systems of a mobile platform for autonomous transportation,...
Free profinite R-trivial monoids (2007)
J. Almeida, Faculdade De Ciencias, Pra��ca Gomes Teixeira, P. Weil
This article is concerned with the structure of semigroups of implicit operations on R, the pseudovariety of all R-trivial semigroups. We give two complementary descriptions for these semigroups:...
A Hybrid System Approach to Feedback Control of a Nonholonomic Car-like Vehicle (2007)
J. Almeida, F. Lobo Pereira, J. Borges Sousa
This paper addresses the design of a hybrid feedback control system enabling a car-like, rectangular vehicle to perform a tight L-shaped turn maneuver. This case constitutes an effort towards the...
Hausdorff dimension in convex bornological spaces (2007)
Abstract. For non-metrizable spaces the classical Hausdorff dimension is meaningless. We extend the notion of Hausdorff dimension to arbitrary locally convex linear topological spaces, and thus to a...
DYNAMICS OF FINITE SEMIGROUPS (2007)
Iteration of implicit operators on pronite algebras provides an easy way of producing interesting implicit operations which in turn can be used to construct useful pseudoidentities. This paper...
The ATLAS DAQ System Online Configurations Database Service Challenge (2007)
Soloviev, I, Almeida, J, Dobson, M, Kazarov, A, Lehmann-Miotto, G, Sloper, J E, ...
This paper describes challenging requirements on the configuration service for the ATLAS experiment at CERN. It presents the status of the implementation and testing one year before the start of data...
Volkov, Modular and threshold subword counting and matrix representations of finite monoids (2005)
Jorge Almeida, Stuart Margolis, Benjamin Steinberg, J. Almeida, S. Margolis, B. Steinberg, ...
Recall that a word u over a finite alphabet Σ is said to be a subword of a word v ∈ Σ ∗ if, for some n ≥ 1, there exist words u1,..., un, v0, v1,..., vn ∈ Σ ∗ such that u = u1u2 · · ·...
The globals of some subpseudovarieties of DA (2003)
Let R be the pseudovariety of all finite semigroups whose principal right ideals have a unique generator, let L be its dual, and let J = R#L.
Subword Complexity of Profinite Words and Subgroups of Free Profinite Semigroups (2003)
We study free profinite subgroups of free profinite semigroups of the same rank using, as main tools, iterated implicit operators, subword complexity and the associated entropy.
The globals of some subpseudovarieties of DA (2002)
Let R be the pseudovariety of all nite semigroups whose principal right ideals have a unique generator, let L be its dual, and let J = R\L.
In vivo nuclear magnetic resonance studies of glycolytic kinetics in Lactococcus lactis (1999)
Neves, A.R., Ramos, A., Nunes, M.C., Kleerebezem, M., Hugenholtz, J., ...
TOPOL, E, CALIFF, R, DIAZ, R, PAOLASSO, E, AYLWARD, P, ...
The pseudovariety J is hyperdecidable (1997)
J. Almeida, M. Zeitoun, Praça Gomes, Teixeira Jussieu
This article defines the notion of hyperdecidability for a class of finite semigroups, which is closely connected to the notion of decidability. It then proves that the pseudovariety J of J-trivial...
The pseudovariety J is hyperdecidable (1997)
J. Almeida, M. Zeitoun, P. Gomes, Teixeira Jussieu
This article defines the notion of hyperdecidability for a class of finite semigroups, which is closely connected to the notion of decidability. It then proves that the pseudovariety J of J -trivial...
Pseudovariety joins involving J-trivial semigroups and completely regular semigroups (1997)
J. Almeida, A. Azevedo, M. Zeitoun, Pura Dep
Rhodes asked during the Chico conference in 1986 for the calculation of joins of semigroup pseudovarieties. This paper proves that the join JV of the pseudovariety J of J -trivial semigroups and of...
The Gap Between Partial and Full (1995)
We show that the interval of the lattice of semigroup pseudovarieties between the pseudovarieties generated by all semigroups of full (respectively, partial) order preserving transformations of a...
Free Profinite Semigroups Over Semidirect Products (1995)
J. Almeida, P. Gomes Teixeira, P. Weil
We give a general description of the free profinite semigroups over a semidirect product of pseudovarieties. More precisely,\Omega A (V W) is described as a closed subsemigroup of a profinite...
Modelling with Generalized Stochastic Petri Nets (1995)
M. Ajmone Marsan, G. Balbo, G. Conte, S. Donatelli, G. Franceschinis, Parallel Computing, ...
[3] S. Andradóttir. Simulation optimization. In Banks [12], pages 307–333.
Development of large-area fast RICH prototypes with pad readout and solid photocathodes (1994)
Almeida, J, Berger, H, Braem, André, Coluzza, C, Di Mauro, A, Ljubicic, A, ...
Boeckhoff, K.H. [Hrsg.]
The Astrophysical Journal, 265(1983) S.417-28
Almeida, J., Bao, Z.Y., Beer, H., Fabbri, F., Hong, L.D., Kaeppeler, F., ...
In: Progress Report on Nuclear Data Research in the Federal Republic of Germany for the Period April 1, 1982 to March 31, 1983
Abdel-Wahab, M.S., Almeida, J., Appel, H., Aures, R., Bao, Z.Y., Beck, R., ...
Beck, R.; Bueche, G.; Fluegge, G.; Kernert, N. [Hrsg.]
Almeida, J., Beer, H., Erbe, D., Kaeppeler, F., Leugers, B., Rupp, G., ...
Fruehjahrstagung DPG, Kernphysik, Karlsruhe, 22.-26.Maerz 1982.
The capture cross sections of the neon isotopes and the s-process neutron balance. (1982)
KfK-3347 (Mai 82)
Almeida, J., Bao, Z.Y., Beer, H., Erbe, D., Fabbri, F., Hong, L.D., ...
In: Progress Report on Nuclear Data Research in the Federal Republic of Germany for the Period April 1, 1981 to March 31, 1982
Der Einfluss von `2`2Ne auf die Neutronenbilanz im s-Prozess. (1981)
Almeida, J., Kaeppeler, F., Erbe, D.
45.Physikertagung der DPG, gemeinsam mit der Fruehjahrstagung Kern- und Teilchenphysik, Kurzzeit- und Plasmaphysik, Hamburg, 23.-27.Maerz 1981. Verhandlungen der Deutschen Physikalischen...
Almeida, J., Beer, H., Cierjacks, S., Dickmann, F., Erbe, D., Hong, L.D., ...
In: Progress Report on Nuclear Data Research in the Federal Republic of Germany for the Period April 1, 1980 to March 31, 1981 NEANDC(E)-222 U Vol.5(July 1981) S.1-15 FIZ-KA--2
Neutroneneinfang und die Entstehung der chemischen Elemente. (1980)
Almeida, J., Beer, H., Kaeppeler, F., Wisshak, K.
KfK-Nachrichten, 12(1980) No 3, S.3-11
Neutron physics: fundamental research, nuclear data. (1980)
Almeida, J., Beer, H., Clayton, D.D., Erbe, D., Hage, W., Kaeppeler, F., ...
In: Annual Report. Teilinstitut Kernphysik des Instituts fuer Angewandte Kernphysik. (July 1, 1979 - June 30, 1980).
M. Abadi, L. Lamport, P. Wolper, M. Hassner, Algorithms For Sliding, R. L. Adler, ...
block codes. An application of symbolic dynamics to information theory,
Profinite Categories and Semidirect Products
J. Almeida, Faculdade De Ciencias, P. Gomes Teixeira, P. Weil
After developing a theory of implicit operations and proving an analogue of Reiterman's theorem for categories, this paper addresses two complementary questions for semidirect products and...
Ørstavik, I., Grandien, M., Halonen, P., Arstila, P., Mordhorst, C. H., Hornsleth, A., ...
From November 1978 to October 1981, a total of 7716 specimens of nasopharyngeal secretions were examined by the rapid immunofluorescence technique to determine the frequency of infections caused by...